TRIASSIC FISHES FROM SPITZBERGEN 
XVII 
Mt Viking (Mt Hamilton Wiman 1914) *), Mt Sticky Keep, Mt Trident, Mt Milne Edwards, 
Mt Andersson (Wiman 1914b) * 2 ), Mt Wallenberg. 
The Trias strata are on the whole all undisturbed in the localities mentioned above. 
Important disturbances have occurred only west of Mt Bertil and Mt Lundbohm, where 
the strata are a little affected by folding, in Flower Valley, where a large fault has 
taken place in the direction from north to south, and finally east of Mt Andersson on 
the north side of Rabot’s Glacier, where a rather large fault from north to south can 
also be observed. 3 ) The fault in Flower Valley has a certain interest as it presumably 
forms the direct continuation southward of the one that has affected the southwest 
corner of Biinsow Land and the west coast of Billen Bay (Stensio 1918a, pp. 79 —80; 
cf. also the map text fig. a in the present work). A number of smaller faults are found 
at the north-east corner of Mt Bertil and Mt Milne Edwards. 
West of Ekman Bey the complex of strata has on the whole a slight dip towards 
the south-west. At Dickson Land this dip. is practically in the same direction, but is 
still weaker, and this is also the case along the south side of Sassen Bay until one 
arrives at the fault line in the Flower Valley. On the eastern side of this line the dip 
has on the whole a southerly direction with a certain tendency to the south-east as far 
as about to the valley between Mt Trident and Mt Milne Edwards, where it turns and 
becomes slightly south-westerly once more. 
The lower Triassic series. — As I have already pointed out in 1918 (1918b, 
pp. 75—76), a part of the sandstones below the black shales must now also be ascribed 
to the Triassic. This lowest Triassic series is, however, little exposed and is therefore 
still only slightly known. So far I have found in most accessible in Dickson Land. 
On the steep shore there about half-way between Mt Congress and Mt Tschermak 
about 1 m above sea-level I fouud a calciferous stratum of sandstone with Discina 
spitzbergensis, a Lingula and a number of other poorly preserved evertebrate fossils, which 
seems to show that we have here a horizon equivalent to the Hustedia limestone and 
Pseudomonotis shales (cf. Nathorst 1910, p. 349). Immediately above this horizon there 
follows another consisting of shaly sandstone with remains, probably of Palaeoniscid 
fishes. There then follows higher up still more shaly sandstone with beds of harder light 
sandstones, sometimes with ripple marks. Concretions occur in certain of the lower strata 
but do not seem to contain fossils. Bright coloured loose sandstones are found highest 
up towards the fish horizon and the transition between th’em and the rock of the fish 
horizon takes place gradually, the sandstones becoming darker (bituminous) and more 
shaly upwards and beginning to contain concretions. Farthest downwards the concretions 
have no fossils, but ammonites and especially Posidononiya soon begin to appear in them 
in great quantities. The rocks which form the main part of the fish horizon and in which 
the concretions are embeded consist as a rule of rather sandy shales more closely 
resembling the underlying series of sandstone than the real black Triassic shales, from 
') Called Mt Viking already in 1911 by Dubois and the name Mt Hamilton proposed by Wiman 1914, 
(1914b, p. 4), is therefore not to be used. 
2 ) The name Mt Andersson also seems inapplicable, as there seems to be a mountain with this name on 
the east coast of Spitzbergen (cf. Wittenburg 1910, p. 33), although I have been unable to find it on any map. 
3 ) This fault is probably the same as that discovered by the «Vorexpedition» to Spitzbergen of W. Filchner 
in 1910 (Philipp, 1914, pp. 15—17). 
Stensio, Triassic Fishes from Spitzbergen. c 
